Spoilers

The trivia items below may give away important plot points.

In season 2, "30 years later" is represented as "Day 10951", ostensibly 10,950 days after "Day 1" (of season 2). In fact, there would be 7 additional days within a 30 year time span, due to leap days. Therefore, "exactly 30 years later" to the calendar day, would actually be 10,957 days later, with "Day 1, 30 years later" occurring on Day 10,958.